We found this simple toy organ circuit in the February 1968 issue of Radio Electronics magazine. The transistors were common at the time and the transformer was from a transistor radio output.
With a boost transistor this circuit supplies currents up to 15 A. Equivalent transistors can be...
This circuit was found in a Motorola Manual of 1965. The circuit has neon lamps as trigger...
The LM109 integrated circuit has been manufactured by many semiconductor industries. The circuit...